But the report authors say the survey sample represents about 2.8% of the farming industry in Wales, a higher ratio than those that may be questioned in a political opinion poll, for example.
First, the change of 3% (from 45% to 48%) is not a very significant change unless the sample size of the survey, which is unclear, was sufficiently large.
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Among the most scientific and serious polls was the large-sample survey (844 respondents) by the Pew Research Center from Jan. 30 through Feb. 2.
The survey sample is anything but representative, but you get the point.
The Adecco survey sample was relatively small, just 522 full-time workers polled in a telephone survey done from November 21-25, but to me, the findings ring true.
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Results of the February survey indicate that CMOs who were more optimistic increased from 29 percent of the sample in August 2012 to a whopping 56 percent in the current survey!
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And based on this sample, the survey projected that 1.4 million people believed they had missed promotion because of weaknesses with literacy and numeracy.
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The analysis, based on a sample survey of voters last year, is viewed as the best source of government data on turnout by race and ethnicity.
Yes, the listeners to the webcast were certainly not a representative sample (not that any survey nowadays is based on a representative sample) but the honest answers may have given us a good indicator of the state of IT readiness for big data.
RAINN's count of pregnancies is based on Justice's victimization survey from 2004-05, in part because the CDC's survey has a smaller sample size, says Scott Berkowitz, RAINN's president and founder.
The annual Girls' Attitudes Survey has canvassed the opinions of a representative sample of girls and young women throughout the UK since 2009.
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An administration official told CNN the sample size of the annual government survey will be expanded to more than 22, 000 teenagers as the more specific questions about smoking habits are added.
But the British Crime Survey, based on sample interviews, found more than ten times as many racial attacks.
The survey is based on a sample size of 257 respondents, 52% of whom see the economy getting stronger or staying the same.
The monthly Consumer Confidence Survey, based on a probability-design random sample, is conducted for The Conference Board by Nielsen.
The survey is based on a representative sample of 5, 000 U.S. households and measures consumer sentiment on current economic conditions and the spending outlook for the next six months.
The online survey, by Nationwide Financial, questioned a small, self-selected sample of advisers, so the results may not be representative.
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The survey's most striking finding comes from its nationally representative sample of teachers.
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These figures are from the country's Sample Registration System (SRS), a comprehensive monthly survey of 1.5m households on births and deaths.
One note of caution in interpreting the survey findings: Deloitte and Forbes Insights polled a relatively small sample, just 356 employees, in the month of March 2011.
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The new analysis, which appears in the June issue of the journal Pediatrics, included a nationally representative sample of 3, 383 adolescents who participated in the National Health and Nutrition Examination Survey, a biannual survey conducted by the CDC.
The survey was done by an outfit called Braun Research that polled a nationally representative sample of 1, 000 working Americans age 18 or older.
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The survey researchers and statisticians associated with the government were committed to obtaining a representative sample of the U.S. population in order to provide a true reflection of the country.
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The survey's sampling error is plus or minus 3 percentage points for the overall sample.
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The unemployment rate is derived from a separate survey of households, which has an even smaller sample size and thus a wider confidence range.
Admittedly, this survey only covers those couples which hired a professional vendor for their wedding, so the sample is skewed towards the bigger spenders.
The number that see themselves as aggressive in this sample is also significant at 36 percent, which is more than double the percentage from our 2011 survey.
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Yet, when we survey participants at IMD, which is probably a much-biased sample because of the corporate seniority of the people involved, the estimates of talent under-utilization are shocking.
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